Division 2.3.2.1 Dilution system

All calculations shall be based upon the average values of the individual modes i during the sampling period.

1. (a)

   For partial-flow dilution, the equivalent mass flow of diluted exhaust gas shall be determined by means of equation (7-51) and the system with flow measurement shown in Figure 9.2:

   $q_{m\mathrm{edf}}=q_{m\mathrm{ew}}\times r_d$	(7-51)
   $r_d=\frac{q_{m\mathrm{dew}}}{q_{m\mathrm{dew}}-q_{m\mathrm{dw}}}$	(7-52)

   Where:

   q_{m edf}

2. equivalent diluted exhaust gas mass flow rate [kg/s]

q_{m ew}

3. exhaust gas mass flow rate on a wet basis [kg/s]

r _d

4. dilution ratio [-]

q_{m dew}

5. diluted exhaust gas mass flow rate on a wet basis [kg/s]

q_{m dw}

6. dilution air mass flow rate [kg/s]